混杂纤维含量对树脂基摩擦材料摩擦磨损性能的影响

Effect of Hybrid Fiber Content on Friction and Wear Properties of Resin⁃based Friction Materials

为了研究多种只由非金属混合组成的增强纤维对树脂基摩擦材料摩擦磨损性能的影响,以腰果壳油改性酚醛树脂(CNSL)为基体,按不同比例加入玻璃纤维、碳纤维和芳纶浆粕纤维,采用热压烧结技术制备摩擦材料。利用与高速钢配副的环块摩擦磨损试验机研究摩擦材料在不同制动工况下的摩擦磨损性能,并利用扫描电子显微镜分析了材料的磨损形貌。结果表明,玻璃纤维、碳纤维、芳纶浆粕纤维的体积比分别为4%、10%、3%所组成的摩擦材料(P3)的硬度比其体积比分别是7%、4%、6%的摩擦材料(P1)和其体积比分别是1%、7%、9%的摩擦材料(P2)的硬度大;在不同的制动条件下,样品P1的摩擦因数最大,P3次之,P2最小,样品P3和P2的相对磨损率相似且比较稳定,约为样品P1的1~1/5,样品P3表现出最佳的摩擦学性能;摩擦材料和对偶材料的磨损形式主要为磨粒磨损。

To study the effect of a variety of reinforcing fibers composed of only non⁃metallic mixtures on the friction and wear properties of resin⁃based friction materials,the friction materials were prepared by adding carbon fiber and aramid pulp fiber through a hot⁃pressing sintering technology using the cashew⁃nut⁃shell⁃liquid⁃modified phenolic resin(CNSL)as a matrix.The friction and wear performance of the friction material under different braking conditions was investigated using a ring block friction and a wear tester equipped with high⁃speed steel.The wear morphology of the friction materi⁃als was analyzed with scanning electron microscopy.The results indicated that the friction material(P3)containing 4 vol%glass fiber,10 vol%carbon fiber and 3 vol%aramid pulp fiber exhibited high hardness than the friction material(P1)at the corresponding fiber contents of 7,4 and 6 vol%and the friction material(P2)at the corresponding fiber con⁃tents of 1,7 and 9 vol%.Under the different braking conditions,the sample P1 had the largest friction factor,the sam⁃ple P3 had the second,and the sample P2 had the smallest.The relative wear rates of the samples P3 and P2 were simi⁃lar and relatively stable,which were about 1~1/5 of that of the sample P1.The sample P3 exhibited the best tribologi⁃cal performance.The wear form of friction material and mating material was determined to be mainly abrasive wear.